US11050773B2 - Selecting security incidents for advanced automatic analysis - Google Patents

Abstract

Prioritizing security incidents for analysis is provided. A set of security information and event management data corresponding to each of a set of security incidents is retrieved. A source weight of a security incident and a magnitude of the security incident are used to determine a priority of the security incident within the set of security incidents. A local analysis of the security incident is performed based on the retrieved set of security information and event management data corresponding to the security incident and the determined priority of the security incident.

Description

BACKGROUND1. Field

The disclosure relates generally to information security and more specifically to identifying and selecting security incidents reported in security information and event management data for advanced automatic analysis utilizing local contextual data and remote cognitive security data and analytics.

2. Description of the Related Art

Information security is the practice of preventing unauthorized access, use, disclosure, disruption, modification, inspection, recording, or destruction of information or data. The information or data may take electronic form, for example. Information security's primary focus is balanced protection of the confidentiality, integrity, and availability of the information or data while maintaining a focus on efficient policy implementation, all without hampering productivity. This is largely achieved through a multi-step risk management process that identifies assets, threat sources, vulnerabilities, potential impacts, and possible controls, followed by assessment of the effectiveness of the risk management plan.

Information security threats come in many different forms. Some of the most common threats today are software attacks, theft of intellectual property, identity theft, theft of information, sabotage, and information extortion. Most people and organizations have experienced some sort of software attack. Viruses, worms, spyware, scareware, phishing attacks, and Trojan horses are a few common examples of software attacks. Identity theft is the attempt to act as someone else usually to obtain that person's personal information or to take advantage of their access to vital information. Theft of information is becoming more prevalent today due to the fact that most devices today are mobile connecting to unsecure networks. Sabotage usually consists of disruption of an organization's website in an attempt to prevent customer access. Information extortion consists of theft of an organization's information as an attempt to receive a payment in exchange for returning the information (e.g., ransomware).

Possible responses to a security risk or threat are, for example: 1) reduce or mitigate the security risk by implementing safeguards and countermeasures to eliminate vulnerabilities or block threats; 2) assign or transfer the security risk by placing the cost of the threat to another entity such as purchasing insurance or outsourcing; and 3) accept the security risk by evaluating whether the cost of a countermeasure outweighs the possible cost of loss due to the threat.

In the field of computer security, security information and event management software products and services combine security information management and security event management. These security information and event management software products and services provide real-time analysis of security alerts generated by applications and network hardware. Also, these security information and event management software products and services are used to log security data and generate reports for compliance purposes.

SUMMARY

According to one illustrative embodiment, a computer-implemented method for prioritizing security incidents for analysis is provided. A set of security information and event management data corresponding to each of a set of security incidents is retrieved. A source weight of a security incident and a magnitude of the security incident are used to determine a priority of the security incident within the set of security incidents. A local analysis of the security incident is performed based on the retrieved set of security information and event management data corresponding to the security incident and the determined priority of the security incident. According to other illustrative embodiments, a computer system and computer program product for prioritizing security incidents for analysis are provided.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a pictorial representation of a network of data processing systems in which illustrative embodiments may be implemented;

FIG. 2 is a diagram of a data processing system in which illustrative embodiments may be implemented;

FIG. 3 is a diagram illustrating a cloud computing environment in which illustrative embodiments may be implemented;

FIG. 4 is a diagram illustrating an example of abstraction layers of a cloud computing environment in accordance with an illustrative embodiment;

FIGS. 5A-5F is a flowchart illustrating a process for selecting security incidents for local and remote analysis in accordance with an illustrative embodiment; and

FIG. 6 is a flowchart illustrating a process for prioritizing security incidents for analysis in accordance with an illustrative embodiment.

DETAILED DESCRIPTION

The present invention may be a system, a method, and/or a computer program product at any possible technical detail level of integration. The computer program product may include a computer readable storage medium (or media) having computer readable program instructions thereon for causing a processor to carry out aspects of the present invention.

The computer readable storage medium can be a tangible device that can retain and store instructions for use by an instruction execution device. The computer readable storage medium may be, for example, but is not limited to, an electronic storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any suitable combination of the foregoing. A non-exhaustive list of more specific examples of the computer readable storage medium includes the following: a portable computer diskette, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), a static random access memory (SRAM), a portable compact disc read-only memory (CD-ROM), a digital versatile disk (DVD), a memory stick, a floppy disk, a mechanically encoded device such as punch-cards or raised structures in a groove having instructions recorded thereon, and any suitable combination of the foregoing. A computer readable storage medium, as used herein, is not to be construed as being transitory signals per se, such as radio waves or other freely propagating electromagnetic waves, electromagnetic waves propagating through a waveguide or other transmission media (e.g., light pulses passing through a fiber-optic cable), or electrical signals transmitted through a wire.

Computer readable program instructions described herein can be downloaded to respective computing/processing devices from a computer readable storage medium or to an external computer or external storage device via a network, for example, the Internet, a local area network, a wide area network and/or a wireless network. The network may comprise copper transmission cables, optical transmission fibers, wireless transmission, routers, firewalls, switches, gateway computers and/or edge servers. A network adapter card or network interface in each computing/processing device receives computer readable program instructions from the network and forwards the computer readable program instructions for storage in a computer readable storage medium within the respective computing/processing device.

Computer readable program instructions for carrying out operations of the present invention may be assembler instructions, instruction-set-architecture (ISA) instructions, machine instructions, machine dependent instructions, microcode, firmware instructions, state-setting data, configuration data for integrated circuitry, or either source code or object code written in any combination of one or more programming languages, including an object oriented programming language such as Smalltalk, C++, or the like, and procedural programming languages, such as the “C” programming language or similar programming languages. The computer readable program instructions may execute entirely on the user's computer, partly on the user's computer, as a stand-alone software package, partly on the user's computer and partly on a remote computer or entirely on the remote computer or server. In the latter scenario, the remote computer may be connected to the user's computer through any type of network, including a local area network (LAN) or a wide area network (WAN), or the connection may be made to an external computer (for example, through the Internet using an Internet Service Provider). In some embodiments, electronic circuitry including, for example, programmable logic circuitry, field-programmable gate arrays (FPGA), or programmable logic arrays (PLA) may execute the computer readable program instructions by utilizing state information of the computer readable program instructions to personalize the electronic circuitry, in order to perform aspects of the present invention.

Aspects of the present invention are described herein with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each block of the flowchart illustrations and/or block diagrams, and combinations of blocks in the flowchart illustrations and/or block diagrams, can be implemented by computer readable program instructions.

These computer readable program instructions may be provided to a processor of a general purpose computer, special purpose computer, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions/acts specified in the flowchart and/or block diagram block or blocks. These computer readable program instructions may also be stored in a computer readable storage medium that can direct a computer, a programmable data processing apparatus, and/or other devices to function in a particular manner, such that the computer readable storage medium having instructions stored therein comprises an article of manufacture including instructions which implement aspects of the function/act specified in the flowchart and/or block diagram block or blocks.

The computer readable program instructions may also be loaded onto a computer, other programmable data processing apparatus, or other device to cause a series of operational steps to be performed on the computer, other programmable apparatus or other device to produce a computer implemented process, such that the instructions which execute on the computer, other programmable apparatus, or other device implement the functions/acts specified in the flowchart and/or block diagram block or blocks.

The flowchart and block diagrams in the Figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods, and computer program products according to various embodiments of the present invention. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of instructions, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the blocks may occur out of the order noted in the Figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. It will also be noted that each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems that perform the specified functions or acts or carry out combinations of special purpose hardware and computer instructions.

With reference now to the figures, and in particular, with reference toFIGS. 1-4, diagrams of data processing environments are provided in which illustrative embodiments may be implemented. It should be appreciated thatFIGS. 1-4 are only meant as examples and are not intended to assert or imply any limitation with regard to the environments in which different embodiments may be implemented. Many modifications to the depicted environments may be made.

FIG. 1 depicts a pictorial representation of a network of data processing systems in which illustrative embodiments may be implemented. Networkdata processing system100 is a network of computers, data processing systems, and other devices in which the illustrative embodiments may be implemented. Networkdata processing system100 containsnetwork102, which is the medium used to provide communications links between the computers, data processing systems, and other devices connected together within networkdata processing system100.Network102 may include connections, such as, for example, wire communication links, wireless communication links, and fiber optic cables.

In the depicted example,server104 andserver106 connect to network102, along withstorage108.Server104 andserver106 may be, for example, server computers with high-speed connections to network102. In addition,server104 andserver106 may provide one or more services, such as, for example, event monitoring services, financial services, banking services, governmental services, educational services, reservation services, real-time data services, gaming services, search services, and the like, to client devices. Also, it should be noted thatserver104 andserver106 may each represent a cluster of servers in one or more data centers, for example.

Further,server104 andserver106 may each include a security information and event manager. However, it should be noted that the security information and event manager may be located on a separate server instead of or in addition toserver104 andserver106. The security information and event manager monitors, logs, and aggregates relevant security information and event data corresponding to the services provided byserver104 andserver106 to identify deviations from the norm and take appropriate action when indicated. For example, when the security information and event manager detects a potential issue, the security information and event manager logs and analyzes the information, generates a security incident alert based on the analysis, and may instruct other security controls to stop progress of suspicious activity corresponding to a provided service. The security information and event manager may be, for example, a rules-based engine or a statistical correlation engine to establish relationships between security event log entries. The security information and event manager may also include user behavior analytics components and security orchestration and automated response components.

Furthermore,server104 andserver106 may send security incidents to a cloud-based platform for further analysis by a cognitive machine learning application based on identified characteristics of the security incidents discovered during local analysis by the security information and event manager. The identified characteristics may include, for example, that an observable is linked to a security incident, that the observable is listed in private or public threat intelligence data, that the observable has a security risk score above a threshold, that the observable is a known malware hash or antivirus signature is linked to the security incident, that execution of the observable, which is a file, is linked to the security incident, that the observable is an asset linked to the security incident that has an asset weight greater than an asset weight threshold, and the like. An observable is information detected in logs on the security information and event manager that corresponds to information that security analysts find interesting. This information of interest to security analysts may be, for example, a particular IP address, username, file hash, file name, registry key, or the like. An asset weight is the relative value of an asset for an organization or enterprise as defined by a security information and event manager administrator.

A security incident is an indication that a security risk or threat exists to information or computer security. A security incident may be an aggregation of a plurality of detected security events augmented with other security information, such as, for example, security incident source weight, security incident magnitude level, security incident start time, security risk level, application vulnerabilities associated with the security incident, threat intelligence data associated with the security incident, and the like. The security information and event manager identifies security risks or threats by unauthorized access toserver104 orserver106, for example. A security incident can, for example, result in misuse of confidential information stored onserver104 andserver106. This may include confidential information, such as social security numbers, credit card numbers, bank account numbers, financial records, health records, or any other information that includes sensitive or personally identifiable information.

Client110,client112, andclient114 also connect to network102.Clients110,112, and114 are clients ofserver104 and/orserver106. In this example,clients110,112, and114 are shown as desktop or personal computers with wire communication links to network102. However, it should be noted thatclients110,112, and114 are examples only and may represent other types of data processing systems, such as, for example, network computers, laptop computers, handheld computers, smart phones, smart watches, smart televisions, gaming devices, and the like. Users ofclients110,112, and114 may utilizeclients110,112, and114 to access and utilize the services provided byserver104 and/orserver106. However, it should be noted that a user of a client device may also perform unintended or intended malicious activity regarding a service provided byserver104 orserver106.

Storage108 is a network storage device capable of storing any type of data in a structured format or an unstructured format. In addition,storage108 may represent a plurality of network storage devices. Further,storage108 may store one or more security incident databases containing a plurality of security incidents, along with their corresponding descriptions, source weights, magnitude levels, and the like. Furthermore,storage unit108 may store other types of data, such as authentication or credential data that may include user names, passwords, and biometric data associated with users, such as, for example, system administrators and security analysts.

In addition, it should be noted that networkdata processing system100 may include any number of additional servers, clients, storage devices, and other devices not shown. Program code located in networkdata processing system100 may be stored on a computer readable storage medium and downloaded to a computer or other data processing device for use. For example, program code may be stored on a computer readable storage medium onserver104 and downloaded toclient110 overnetwork102 for use onclient110.

In the depicted example, networkdata processing system100 may be implemented as a number of different types of communication networks, such as, for example, an internet, an intranet, a local area network (LAN), a metropolitan area network (MAN), a wide area network (WAN), a telecommunications network, or any combination thereof.FIG. 1 is intended as an example only, and not as an architectural limitation for the different illustrative embodiments.

With reference now toFIG. 2, a diagram of a data processing system is depicted in accordance with an illustrative embodiment.Data processing system200 is an example of a computer, such asserver104 inFIG. 1, in which computer readable program code or instructions implementing processes of illustrative embodiments may be located.Data processing system200 provides services to client devices, such as,clients110,112, and114 inFIG. 1. In this illustrative example,data processing system200 includescommunications fabric202, which provides communications betweenprocessor unit204,memory206,persistent storage208,communications unit210, input/output (I/O)unit212, anddisplay214.

Processor unit204 serves to execute instructions for software applications and programs that may be loaded intomemory206.Processor unit204 may be a set of one or more hardware processor devices or may be a multi-core processor, depending on the particular implementation.

Memory206 andpersistent storage208 are examples ofstorage devices216. A computer readable storage device is any piece of hardware that is capable of storing information, such as, for example, without limitation, data, computer readable program code in functional form, and/or other suitable information either on a transient basis and/or a persistent basis. Further, a computer readable storage device excludes a propagation medium.Memory206, in these examples, may be, for example, a random-access memory (RAM), or any other suitable volatile or non-volatile storage device.Persistent storage208 may take various forms, depending on the particular implementation. For example,persistent storage208 may contain one or more devices. For example,persistent storage208 may be a hard drive, a flash memory, a rewritable optical disk, a rewritable magnetic tape, or some combination of the above. The media used bypersistent storage208 may be removable. For example, a removable hard drive may be used forpersistent storage208.

In this example,persistent storage208 stores security information andevent manager218. However, it should be noted that even though security information andevent manager218 is illustrated as residing inpersistent storage208, in an alternative illustrative embodiment security information andevent manager218 may be a separate component ofdata processing system200. For example, security information andevent manager218 may be a hardware component coupled tocommunication fabric202 or a combination of hardware and software components. In another alternative illustrative embodiment, a first set of components of security information andevent manager218 may be located indata processing system200 and a set of components of security information andevent manager218 may be located in a second data processing system, such as, for example,server106. In yet another alternative illustrative embodiment, security information andevent manager218 may be located in another data processing system in addition to or instead ofdata processing system200.

Security information andevent manager218 controls the process of selecting only certain security incidents for local and remote analysis. Thus, security information andevent manager218 saves resources (e.g., processor cycles, memory, storage, and the like) ofdata processing system200, thereby increasing performance ofdata processing system200 to execute services provided bydata processing system200. In this example, security information andevent manager218 includessecurity incident database220, which containssecurity incidents222. However, it should be noted that in an alternative illustrative embodimentsecurity incident database220 may be located in a separate storage device, such asstorage108 inFIG. 1.Security incidents222 represent information corresponding to a plurality of different security events regarding the one or more services provided bydata processing system200.

Search interval224 represents a predefined time interval, such as, for example, hourly, daily, weekly, monthly, or any other increment of time. Security information andevent manager218 utilizessearch interval224 to determine when to searchsecurity incident database220 for new andunanalyzed security incidents226. New andunanalyzed security incidents226 are a subset ofsecurity incidents222. New andunanalyzed security incidents226 represent those security incidents that are new security incidents or unanalyzed security incidents since thelast search interval224.

Source weight228 represents a predefined weight assigned by a system administrator or security analyst to a source of a security incident, such as a particular username, Internet Protocol (IP) address, file name, or the like.Magnitude230 represents a magnitude score or value provided by security information andevent manger218 for a security incident. Security information andevent manger218 utilizessource weight228 andmagnitude230 corresponding to each particular security incident in new andunanalyzed security incidents226 to rank and prioritize each of new andunanalyzed security incidents226. Security information andevent manger218 generates ranked list ofsecurity incidents232 based on rankings corresponding to new andunanalyzed security incidents226.

Security information andevent manger218 appliesthresholds234 andfilters236 to highest-ranking security incidents in ranked list ofsecurity incidents232 to determine which security incidents to analyze locally.Thresholds234 may include, for example, security incident times and magnitude thresholds. Security incident times may include, for example, date security incident began, date the security incident was last updated, date of first activity of the security incident, date of last activity of the security incident, which is different from date of last update, and the like.Filters236 may include, for example, security incident source and category filters. Further, during local analysis of the security incidents, security information andevent manger218 may identify one or more characteristics associated with each security incident. The characteristics may include, for example, whether observables are linked to security incidents, whether the observables are listed in private or public threat intelligence data, whether the observables have security risk scores above a threshold, whether the observables are known malware hashes or antivirus signatures linked to security incidents, whether execution of the observables, which are files, are linked to security incidents, whether the observables are assets, which are linked to security incidents, having an asset weight greater than an asset weight threshold, and the like. If security information andevent manger218 discovers that a particular security incident has one or more of the above characteristics, then security information andevent manger218 sends that particular security incident for remote analysis by a cloud-based platform.

Communications unit210, in this example, provides for communication with other computers, data processing systems, and devices via a network, such asnetwork102 inFIG. 1.Communications unit210 may provide communications through the use of both physical and wireless communications links. The physical communications link may utilize, for example, a wire, cable, universal serial bus, or any other physical technology to establish a physical communications link fordata processing system200. The wireless communications link may utilize, for example, shortwave, high frequency, ultra high frequency, microwave, wireless fidelity (Wi-Fi), Bluetooth® technology, global system for mobile communications (GSM), code division multiple access (CDMA), second-generation (2G), third-generation (3G), fourth-generation (4G), 4G Long Term Evolution (LTE), LTE Advanced, fifth-generation (5G), or any other wireless communication technology or standard to establish a wireless communications link fordata processing system200.

Input/output unit212 allows for the input and output of data with other devices that may be connected todata processing system200. For example, input/output unit212 may provide a connection for user input through a keypad, a keyboard, a mouse, a microphone, and/or some other suitable input device.Display214 provides a mechanism to display information to a user and may include touch screen capabilities to allow the user to make on-screen selections through user interfaces or input data, for example.

Instructions for the operating system, applications, and/or programs may be located instorage devices216, which are in communication withprocessor unit204 throughcommunications fabric202. In this illustrative example, the instructions are in a functional form onpersistent storage208. These instructions may be loaded intomemory206 for running byprocessor unit204. The processes of the different embodiments may be performed byprocessor unit204 using computer-implemented instructions, which may be located in a memory, such asmemory206. These program instructions are referred to as program code, computer usable program code, or computer readable program code that may be read and run by a processor inprocessor unit204. The program instructions, in the different embodiments, may be embodied on different physical computer readable storage devices, such asmemory206 orpersistent storage208.

Program code238 is located in a functional form on computerreadable media240 that is selectively removable and may be loaded onto or transferred todata processing system200 for running byprocessor unit204.Program code238 and computerreadable media240 formcomputer program product242. In one example, computerreadable media240 may be computerreadable storage media244 or computerreadable signal media246. Computerreadable storage media244 may include, for example, an optical or magnetic disc that is inserted or placed into a drive or other device that is part ofpersistent storage208 for transfer onto a storage device, such as a hard drive, that is part ofpersistent storage208. Computerreadable storage media244 also may take the form of a persistent storage, such as a hard drive, a thumb drive, or a flash memory that is connected todata processing system200. In some instances, computerreadable storage media244 may not be removable fromdata processing system200.

Alternatively,program code238 may be transferred todata processing system200 using computerreadable signal media246. Computerreadable signal media246 may be, for example, a propagated data signal containingprogram code238. For example, computerreadable signal media246 may be an electro-magnetic signal, an optical signal, and/or any other suitable type of signal. These signals may be transmitted over communication links, such as wireless communication links, an optical fiber cable, a coaxial cable, a wire, and/or any other suitable type of communications link. In other words, the communications link and/or the connection may be physical or wireless in the illustrative examples. The computer readable media also may take the form of non-tangible media, such as communication links or wireless transmissions containing the program code.

In some illustrative embodiments,program code238 may be downloaded over a network topersistent storage208 from another device or data processing system through computerreadable signal media246 for use withindata processing system200. For instance, program code stored in a computer readable storage media in a data processing system may be downloaded over a network from the data processing system todata processing system200. The data processing system providingprogram code238 may be a server computer, a client computer, or some other device capable of storing and transmittingprogram code238.

The different components illustrated fordata processing system200 are not meant to provide architectural limitations to the manner in which different embodiments may be implemented. The different illustrative embodiments may be implemented in a data processing system including components in addition to, or in place of, those illustrated fordata processing system200. Other components shown inFIG. 2 can be varied from the illustrative examples shown. The different embodiments may be implemented using any hardware device or system capable of executing program code. As one example,data processing system200 may include organic components integrated with inorganic components and/or may be comprised entirely of organic components excluding a human being. For example, a storage device may be comprised of an organic semiconductor.

As another example, a computer readable storage device indata processing system200 is any hardware apparatus that may store data.Memory206,persistent storage208, and computerreadable storage media244 are examples of physical storage devices in a tangible form.

In another example, a bus system may be used to implementcommunications fabric202 and may be comprised of one or more buses, such as a system bus or an input/output bus. Of course, the bus system may be implemented using any suitable type of architecture that provides for a transfer of data between different components or devices attached to the bus system. Additionally, a communications unit may include one or more devices used to transmit and receive data, such as a modem or a network adapter. Further, a memory may be, for example,memory206 or a cache such as found in an interface and memory controller hub that may be present incommunications fabric202.

It is understood that although this disclosure includes a detailed description on cloud computing, implementation of the teachings recited herein are not limited to a cloud computing environment. Rather, illustrative embodiments are capable of being implemented in conjunction with any other type of computing environment now known or later developed. Cloud computing is a model of service delivery for enabling convenient, on-demand network access to a shared pool of configurable computing resources, such as, for example, networks, network bandwidth, servers, processing, memory, storage, applications, virtual machines, and services, which can be rapidly provisioned and released with minimal management effort or interaction with a provider of the service. This cloud model may include at least five characteristics, at least three service models, and at least four deployment models.

The characteristics may include, for example, on-demand self-service, broad network access, resource pooling, rapid elasticity, and measured service. On-demand self-service allows a cloud consumer to unilaterally provision computing capabilities, such as server time and network storage, as needed automatically without requiring human interaction with the service's provider. Broad network access provides for capabilities that are available over a network and accessed through standard mechanisms that promote use by heterogeneous thin or thick client platforms, such as, for example, mobile phones, laptops, and personal digital assistants. Resource pooling allows the provider's computing resources to be pooled to serve multiple consumers using a multi-tenant model, with different physical and virtual resources dynamically assigned and reassigned according to demand. There is a sense of location independence in that the consumer generally has no control or knowledge over the exact location of the provided resources, but may be able to specify location at a higher level of abstraction, such as, for example, country, state, or data center. Rapid elasticity provides for capabilities that can be rapidly and elastically provisioned, in some cases automatically, to quickly scale out and rapidly released to quickly scale in. To the consumer, the capabilities available for provisioning often appear to be unlimited and can be purchased in any quantity at any time. Measured service allows cloud systems to automatically control and optimize resource use by leveraging a metering capability at some level of abstraction appropriate to the type of service, such as, for example, storage, processing, bandwidth, and active user accounts. Resource usage can be monitored, controlled, and reported providing transparency for both the provider and consumer of the utilized service.

Service models may include, for example, Software as a Service (SaaS), Platform as a Service (PaaS), and Infrastructure as a Service (IaaS). Software as a Service is the capability provided to the consumer to use the provider's applications running on a cloud infrastructure. The applications are accessible from various client devices through a thin client interface, such as a web browser (e.g., web-based e-mail). The consumer does not manage or control the underlying cloud infrastructure including network, servers, operating systems, storage, or even individual application capabilities, with the possible exception of limited user-specific application configuration settings. Platform as a Service is the capability provided to the consumer to deploy onto the cloud infrastructure consumer-created or acquired applications created using programming languages and tools supported by the provider. The consumer does not manage or control the underlying cloud infrastructure including networks, servers, operating systems, or storage, but has control over the deployed applications and possibly application hosting environment configurations. Infrastructure as a Service is the capability provided to the consumer to provision processing, storage, networks, and other fundamental computing resources where the consumer is able to deploy and run arbitrary software, which can include operating systems and applications. The consumer does not manage or control the underlying cloud infrastructure, but has control over operating systems, storage, deployed applications, and possibly limited control of select networking components, such as, for example, host firewalls.

Deployment models may include, for example, a private cloud, community cloud, public cloud, and hybrid cloud. A private cloud is a cloud infrastructure operated solely for an organization. The private cloud may be managed by the organization or a third party and may exist on-premises or off-premises. A community cloud is a cloud infrastructure shared by several organizations and supports a specific community that has shared concerns, such as, for example, mission, security requirements, policy, and compliance considerations. The community cloud may be managed by the organizations or a third party and may exist on-premises or off-premises. A public cloud is a cloud infrastructure made available to the general public or a large industry group and is owned by an organization selling cloud services. A hybrid cloud is a cloud infrastructure composed of two or more clouds, such as, for example, private, community, and public clouds, which remain as unique entities, but are bound together by standardized or proprietary technology that enables data and application portability, such as, for example, cloud bursting for load-balancing between clouds.

A cloud computing environment is service oriented with a focus on statelessness, low coupling, modularity, and semantic interoperability. At the heart of cloud computing is an infrastructure comprising a network of interconnected nodes.

With reference now toFIG. 3, a diagram illustrating a cloud computing environment is depicted in which illustrative embodiments may be implemented. In this illustrative example,cloud computing environment300 includes a set of one or morecloud computing nodes310 with which local computing devices used by cloud consumers, such as, for example, personal digital assistant or asmart phone320A,desktop computer320B,laptop computer320C, and/orautomobile computer system320N, may communicate.Cloud computing nodes310 may be, for example,server104 andserver106 inFIG. 1.Local computing devices320A-320N may be, for example, clients110-114 inFIG. 1.

Cloud computing nodes310 may communicate with one another and may be grouped physically or virtually into one or more networks, such as private, community, public, or hybrid clouds as described hereinabove, or a combination thereof. This allowscloud computing environment300 to offer infrastructure, platforms, and/or software as services for which a cloud consumer does not need to maintain resources on a local computing device, such aslocal computing devices320A-320N. It is understood that the types oflocal computing devices320A-320N are intended to be illustrative only and thatcloud computing nodes310 andcloud computing environment300 can communicate with any type of computerized device over any type of network and/or network addressable connection using a web browser, for example.

With reference now toFIG. 4, a diagram illustrating abstraction model layers is depicted in accordance with an illustrative embodiment. The set of functional abstraction layers shown in this illustrative example may be provided by a cloud computing environment, such ascloud computing environment300 inFIG. 3. It should be understood in advance that the components, layers, and functions shown inFIG. 4 are intended to be illustrative only and embodiments of the invention are not limited thereto. As depicted, the following layers and corresponding functions are provided.

Abstraction layers of acloud computing environment400 include hardware andsoftware layer402,virtualization layer404,management layer406, andworkloads layer408. Hardware andsoftware layer402 includes the hardware and software components of the cloud computing environment. The hardware components may include, for example,mainframes410, RISC (Reduced Instruction Set Computer) architecture-basedservers412,servers414,blade servers416,storage devices418, and networks andnetworking components420. In some illustrative embodiments, software components may include, for example, networkapplication server software422 anddatabase software424.

Virtualization layer404 provides an abstraction layer from which the following examples of virtual entities may be provided:virtual servers426;virtual storage428;virtual networks430, including virtual private networks; virtual applications andoperating systems432; andvirtual clients434.

In one example,management layer406 may provide the functions described below.Resource provisioning436 provides dynamic procurement of computing resources and other resources, which are utilized to perform tasks within the cloud computing environment. Metering andpricing438 provide cost tracking as resources are utilized within the cloud computing environment, and billing or invoicing for consumption of these resources. In one example, these resources may comprise application software licenses. Security provides identity verification for cloud consumers and tasks, as well as protection for data and other resources.User portal440 provides access to the cloud computing environment for consumers and system administrators.Service level management442 provides cloud computing resource allocation and management such that required service levels are met. Service level agreement (SLA) planning andfulfillment444 provides pre-arrangement for, and procurement of, cloud computing resources for which a future requirement is anticipated in accordance with an SLA.

Workloads layer408 provides examples of functionality for which the cloud computing environment may be utilized. Example workloads and functions, which may be provided byworkload layer408, may include mapping andnavigation446, software development andlifecycle management448, virtualclassroom education delivery450, data analytics processing452,transaction processing454, andsecurity incident analytics456.

Typically, a security analyst is overwhelmed by the sheer number of security incidents that the security analyst must deal with every day within a security information and event management system environment. Current security information and event management systems can automatically investigate these security incidents, but even these current security information and event management systems cannot investigate every single security incident at scale. In addition, these current security information and event management systems cannot identify the urgency for security incident responses by automatically identifying and analyzing important and relevant security incidents. The use of cloud-based security incident analysis for every security incident reported by a security information and event management system also is not optimal. For example, not all security incidents benefit from cloud-based analysis that deal with observables that are mostly contained in ingress or egress data. In addition, issues exist regarding cost, scalability, and license usage associated with cloud-based analysis of all local security incidents.

Illustrative embodiments select certain reported security incidents for cloud-based analysis by applying insights derived from local and remote contexts. In other words, illustrative embodiments optimally utilize automatic investigation of security incidents reported by a security information and event management system by selecting security incidents based on a plurality of local and remote environment contextual factors. The local environment contextual factors may include, for example, a magnitude score of a security incident exceeding a security incident magnitude threshold level defined by the security information and event management system; a status of the security incident (e.g., whether or not the security incident is currently under analysis); a source of the security incident (e.g., a particular user identifier, IP address, rule, or the like); and a category of the security incident (e.g., denial of service attack, malware detection, anomalous user behavior, or the like). The remote environment contextual factors may include, for example, a known malicious hash or antivirus signature linked to the security incident; detected execution of malware associated with the security incident; and indicators related to the security incident that are associated with advanced kill chain stage, such as, for example Command and Control instructions or data exfiltration. Command and Control instructions are issued by a malicious user to take control of a computer system remotely. Data exfiltration is the unauthorized transfer of data from a computer system. Such a transfer may be automated and carried out through malicious programming over a network.

Illustrative embodiments prioritize security incidents based on information and data corresponding to those security incidents. Illustrative embodiments identify security incidents that need cloud-based security incident analytics by using, for example, information and data provided by the security information and event management system; identification of a “root” of a security incident (i.e., an object, such as a person or computer, that is the center of, or key to, the security incident) to prioritize analysis of the security incident; identification of a current analysis status of the security incident (i.e., whether or not the security incident is still active or open) to prioritize analysis of the security incident; identification of a category of the security incident (e.g., denial of service attack, detection of malware, anomalous user behavior, or the like) to prioritize analysis of the security incident.

Illustrative embodiments optimally utilize cloud-based security incident analysis based on applying unique criteria to determine the need for cognitive analytics. For example, illustrative embodiments identify security incidents containing observables found in private or public threat intelligence data; identification of observable data intelligence indicating correspondence to an advanced cyber kill chain stage; and identification of antivirus signatures or hashes associated with malware noted in the security incident. Illustrative embodiments utilize discovered and user-provided criteria for determining whether a security incident is to be investigated further by a cloud-based platform. Further, illustrative embodiments assess the magnitude of a response corresponding to the security incident post cloud-based analytics by utilizing output of a cognitive analytics component that indicates data breach, active malware campaign, or applicability to a security incident domain, for example.

However, it should be noted that illustrative embodiments are not merely performing local or cloud-based security incident analytics. In other words, illustrative embodiments are not merely generating information or data to be used to determine security incident root, security incident category, or whether the security incident is still active or open. Instead, illustrative embodiments are utilizing this information and data to prioritize the analysis of such a security incident.

First, illustrative embodiments determine whether a security incident is to be analyzed locally on a computer system. Local analysis is analysis of a security incident performed entirely on the security information and events manager of the local computer system and performed with data contained within the security information and events manager. Illustrative embodiments begin by querying the security information and event manager on a preset time interval basis to determine whether any new or unanalyzed security incidents are found in a security incident database of the security information and event manager. Illustrative embodiments then sort found security incidents in descending order of priority according to the weight of each security incident's source, which is provided by the security information and event manager, when the source of a security incident is an asset connected to the network. An asset is any data, document, device, or other component of the local computer system environment that supports information-related activities. In addition, illustrative embodiments continue to sort the found security incidents in descending order of priority according to the magnitude value of each found security incident, which also is provided by the security information and event manager. It should be noted that if illustrative embodiments have already analyzed a found security incident, illustrative embodiments do not analyze that particular security incident again.

Further, illustrative embodiments filter the found security incidents by whether the security incidents started less than a first predefined number of minutes ago and were last updated greater than a second predefined number of minutes ago. Furthermore, illustrative embodiments continue filtering the found security incidents based on whether the security information and event manager-provided magnitude value of each security incident is greater than a first security incident magnitude threshold value and less than a second security incident magnitude threshold value. Moreover, illustrative embodiments filter the found security incidents based on whether the security incidents are active security incidents or open security incidents (e.g., not previously closed). An active security incident is a security incident that the security information and event manager has recently categorized events or flows for that security incident within the last defined “X” number of minutes. An open security incident is a security incident that has not been marked as closed or analyzed in the security information and event manager and has not been removed due to data retention.

Illustrative embodiments further determine whether a user, such as a system administrator or security analyst, defined a security incident source (i.e., root) filter for the found security incidents and whether sources of the found security incidents are listed in the defined security incident source filter. A security incident source filter is a filter that can optionally be defined by the user and is used as a whitelist for security incident sources. If illustrative embodiments find that a security incident is listed in the security incident source filter, then illustrative embodiments analyze that security incident. In addition, illustrative embodiments determine whether the user defined a security incident category filter for the found security incidents and whether categories corresponding to the found security incidents are listed in the defined security incident category filter. A security incident category filter is a filter that can optionally be defined by the user and is used as a whitelist for security incident categories. A security incident category is a security information and event manager-provided category for a security incident based on events or data contained in that security incident. If illustrative embodiments find that a security incident is listed in the security incident category filter, then illustrative embodiments analyze that security incident.

Afterward, illustrative embodiments determine whether a particular security incident is to be analyzed by a cloud-based platform. Cloud-based analysis is analysis of a security incident based on data contained in the cloud-based platform and performed in an application that is hosted in the cloud-based platform. In other words, after illustrative embodiments have completed the security incident analysis using the security information and event manager on the local computer system, then illustrative embodiments may optionally send analysis of a particular security incident for analysis by the cloud-based platform. The cloud-based platform utilizes more security incident data received from other security information and event management systems and other security information sources and also utilizes its higher-level of processing power to perform the cognitive security incident analysis.

Illustrative embodiments send a particular security incident for cloud-based analysis when one of a plurality of different conditions are met. For example, illustrative embodiments send a security incident for cloud-based analysis in response to determining that an observable is linked to the security incident and the magnitude of the security incident is greater than the first security incident magnitude threshold value. An observable is a piece of data gleaned from log activity on the security information and event manager corresponding to information that security analysts commonly are interested in. This information of interest to security analysts may be, for example, a particular IP address, username, file hash, file name, registry key, or the like. Or, illustrative embodiments send the security incident for cloud-based analysis in response to determining that a known malware hash or antivirus signature is linked to the security incident. Or, illustrative embodiments send the security incident for cloud-based analysis in response to determining that execution of a file (i.e., any file) in the local computer system is linked to the security incident. Or, illustrative embodiments send the security incident for cloud-based analysis in response to determining that the observable linked to the security incident was found in private threat intelligence information. Private threat intelligence information is sets of possible observables defined by the system administrator in the security information and event manager that are known to the administrator's organization or enterprise as being risky (i.e., presenting a security risk to assets connected to the network). Or, illustrative embodiments send the security incident for cloud-based analysis in response to determining that the observable linked to the security incident has a security risk score greater than a security risk threshold level. Or, illustrative embodiments send the security incident for cloud-based analysis in response to determining that an asset connected to the network is linked to the security incident and that the asset has a predefined asset weight greater than an asset weight threshold level. An asset weight is the relative value of an asset for the organization or enterprise as defined by the security information and event manager administrator. Or, illustrative embodiments send the security incident for cloud-based analysis in response to determining that the user enabled cloud-based analysis for all found security incidents.

With reference now toFIGS. 5A-5F, a flowchart illustrating a process for selecting security incidents for local and remote analysis is shown in accordance with an illustrative embodiment. The process shown inFIGS. 5A-5F may be implemented in a computer, such as, for example,server104 inFIG. 1.

The process begins when the computer determines whether it is time to search a security incidents database, such assecurity incidents database220 inFIG. 2 (step502). The computer may use for example, a time interval, such assearch interval224 inFIG. 2, to determine when it is time to perform a search of the security incidents database. If the computer determines that it is not time to search the security incidents database, no output ofstep502, then the process returns to step502 where the computer waits until it is time to perform a search. If the computer determines that it is time to search the security incidents database, yes output ofstep502, then the computer performs the search of the security incidents database (step504).

The computer makes a determination as to whether the computer found any new or unanalyzed security incidents during the search of the security incidents database (step506). If the computer determines that no new or unanalyzed security incidents were found during the search of the security incidents database, no output ofstep506, then the process returns to step502 where the computer waits until it is time to perform another search of the security incidents database. If the computer determines that one or more new or unanalyzed security incidents were found during the search of the security incidents database, yes output ofstep506, then the computer sorts found security incidents in descending order by security incident source weight, such assource weight228 inFIG. 2, of each found security incident (step508). Further, the computer again sorts the found security incidents in descending order by security incident magnitude, such asmagnitude230 inFIG. 2, of each found security incident (step510).

Afterward, the computer generates a ranked list of the found security incidents from highest ranking to lowest ranking based on the sorting according to source weight and magnitude of each found security incident (step512). The computer selects a highest-ranking security incident in the ranked list (step514). The computer makes a determination as to whether the selected security incident started less than a first predefined threshold number of minutes ago (step516). The first predefined threshold number of minutes may be, for example, 1 minute, 5 minutes, 10 minutes, or the like.

If the computer determines that the selected security incident started after the first predefined threshold number of minutes (i.e., greater than the first predefined threshold number of minutes ago), no output ofstep516, then the process proceeds to step556. If the computer determines that the selected security incident started before the first predefined threshold number of minutes (i.e., less than the first predefined threshold number of minutes ago), yes output ofstep516, then the computer makes a determination as to whether the selected security incident was last updated greater than a second predefined threshold number of minutes ago (step518). The second predefined threshold number of minutes may be, for example, 15 minutes, 30 minutes, 60 minutes, or the like.

If the computer determines that the selected security incident was last updated less than the second predefined threshold number of minutes ago, no output ofstep518, then the process proceeds to step556. If the computer determines that the selected security incident was last updated greater than the second predefined threshold number of minutes ago, yes output ofstep518, then the computer makes a determination as to whether the selected security incident has a magnitude greater than a first predefined security incident magnitude threshold level (step520). The first predefined security incident magnitude threshold level may be, for example, a magnitude threshold level of 0, 1, 2, or the like.

If the computer determines that the selected security incident has a magnitude less than the first predefined security incident magnitude threshold level, no output ofstep520, then the process proceeds to step556. If the computer determines that the selected security incident has a magnitude greater than the first predefined security incident magnitude threshold level, yes output ofstep520, then the computer makes a determination as to whether the selected security incident has a magnitude less than a second predefined security incident magnitude threshold level (step522). The second predefined security incident magnitude threshold level may be, for example, a magnitude threshold level of 5, 10, 20, or the like.

If the computer determines that the selected security incident has a magnitude greater than the second predefined security incident magnitude threshold level, no output ofstep522, then the process proceeds to step556. If the computer determines that the selected security incident has a magnitude less than the second predefined security incident magnitude threshold level, yes output ofstep522, then the computer makes a determination as to whether the selected security incident is an active security incident (step524).

If the computer determines that the selected security incident is an active security incident, yes output ofstep524, then the process proceeds to step528. If the computer determines that the selected security incident is not an active security incident, no output ofstep524, then the computer makes a determination as to whether the selected security incident is an open security incident (step526).

If the computer determines that the selected security incident is not an open security incident, no output ofstep526, then the process proceeds to step556. If the computer determines that the selected security incident is an open security incident, yes output ofstep526, then the computer makes a determination as to whether a security incident source filter is defined (step528). The security incident source filter may optionally be defined by a system administrator or security analyst, for example.

If the computer determines that a security incident source filter is not defined, no output ofstep528, then the process proceeds to step532. If the computer determines that a security incident source filter is defined, yes output ofstep528, then the computer makes a determination as to whether a source of the selected security incident is listed in the security incident source filter (step530). The source of the selected security incident may be, for example, a particular user, IP address, or file name.

If the computer determines that the source of the selected security incident is not listed in the security incident source filter, no output ofstep530, then the process proceeds to step556. If the computer determines that the source of the selected security incident is listed in the security incident source filter, yes output ofstep530, then the computer makes a determination as to whether a security incident category filter is defined (step532). The system administrator or security analyst also may optionally define the security incident category filter.

If the computer determines that a security incident category filter is not defined, no output ofstep532, then the process proceeds to step536. If the computer determines that a security incident category filter is defined, yes output ofstep532, then the computer makes a determination as to whether a category of the selected security incident is listed in the security incident category filter (step534). The category of the selected security incident may be, for example, denial of service attack, malware detection, anomalous user behavior, or the like.

If the computer determines that the category of the selected security incident is not listed in the security incident category filter, no output ofstep534, then the process proceeds to step556. If the computer determines that the category of the selected security incident is listed in the security incident category filter, yes output ofstep534, then the computer performs local analysis of the selected security incident using a security information and event manager, such as security information andevent manager218 inFIG. 2 (step536). In addition, the computer generates a result of the local analysis of the selected security incident (step538).

Afterward, the computer makes a determination as to whether an observable exists in the result of the local analysis of the selected security incident (step539). An observable is information, such as a file name, user name, registry key, and the like, within event logs of the security information and event manager that is of interest to security analysts. If the computer determines that an observable does not exist in the result, no output ofstep539, then the process proceeds to step556. If the computer determines that an observable does exist in the result, yes output ofstep539, then the computer makes a determination as to whether the observable found in the result of the local analysis of the selected security incident is linked to another security incident (i.e., different from the selected security incident) (step540). If the computer determines that the observable found in the result is linked to another security incident, yes output ofstep540, then the computer makes a determination as to whether a magnitude of the other security incident is greater than the first predefined security incident magnitude threshold level (step542). If the computer determines that the magnitude of the other security incident is greater than the first predefined security incident magnitude threshold level, yes output ofstep542, then the process proceeds to step560. If the computer determines that the magnitude of the other security incident is less than the first predefined security incident magnitude threshold level, no output ofstep542, then the process proceeds to step544.

Returning again to step540, if the computer determines that the observable found in the result of the local analysis of the selected security incident is not linked to another security incident, no output ofstep540, then the computer makes a determination as to whether the observable is a known malware hash or antivirus signature linked to the selected security incident based on the result of the local analysis of the selected security incident (step544). If the computer determines that the observable is a known malware hash or antivirus signature linked to the selected security incident based on the result of the local analysis of the selected security incident, yes output ofstep544, then the process proceeds to step560. If the computer determines that the observable is not a known malware hash or antivirus signature linked to the selected security incident based on the result of the local analysis of the selected security incident, no output ofstep544, then the computer makes a determination as to whether the observable linked to the selected security incident is found in private or public threat intelligence data (step546).

If the computer determines that the observable linked to the selected security incident is found in private or public threat intelligence data, yes output ofstep546, then the process proceeds to step560. If the computer determines that the observable linked to the selected security incident is not found in private or public threat intelligence data, no output ofstep546, then the computer makes a determination as to whether execution of the observable, which is a file, is linked to the selected security incident based on the result of the local analysis of the selected security incident (step548).

If the computer determines that execution of the observable, which is a file, is linked to the selected security incident based on the result of the local analysis of the selected security incident, yes output ofstep548, then the process proceeds to step560. If the computer determines that no execution of the observable, which is a file, is linked to the selected security incident based on the result of the local analysis of the selected security incident, no output ofstep548, then the computer makes a determination as to whether the observable linked to the selected security incident has a security risk score greater than a security risk threshold level (step550).

If the computer determines that the observable linked to the selected security incident has a security risk score greater than the security risk threshold level, yes output ofstep550, then the process proceeds to step560. If the computer determines that the observable linked to the selected security incident has a security risk score less than the security risk threshold level, no output ofstep550, then the computer makes a determination as to whether the observable, which is an asset, linked to the selected security incident has an asset weight greater than an asset weight threshold level (step552).

If the computer determines that the observable, which is an asset, linked to the selected security incident has an asset weight greater than the asset weight threshold level, yes output ofstep552, then the process proceeds to step560. If the computer determines that the observable, which is an asset, linked to the selected security incident has an asset weight less than the asset weight threshold level, no output ofstep552, then the computer makes a determination as to whether cloud analysis is enabled for all found security incidents (step554).

If the computer determines that cloud analysis is not enabled for all found security incidents, no output ofstep554, then the computer stops further analysis of the selected security incident (step556). The computer also makes a determination as to whether another found security incident exists in the ranked list (step558). If the computer determines that another found security incident does exist in the ranked list, yes output ofstep558, then the process returns to step514 where the computer selects the next highest-ranking security incident in the ranked list. If the computer determines that another found security incident does not exist in the ranked list, no output ofstep558, then the process returns to step502 where the computer waits until it is time to perform another search of the security incidents database.

Returning again to step554, if the computer determines that cloud analysis is enabled for all found security incidents, yes output ofstep554, then the computer sends the selected security incident for cloud-based analysis (step560). Subsequently, the computer receives a result of the cloud-based analysis of the selected security incident (step562). The computer adjusts the magnitude of the selected security incident based on the result of the cloud-based analysis (step564).

Afterward, the computer makes a determination as to whether the adjusted magnitude of the selected security incident is greater than a security incident magnitude threshold level (step566). If the computer determines that the adjusted magnitude of the selected security incident is less than the security incident magnitude threshold level, no output ofstep566, then the process returns to step558 where the computer determines whether another security incident exists in the ranked list. If the computer determines that the adjusted magnitude of the selected security incident is greater than the security incident magnitude threshold level, yes output ofstep566, then the computer performs a set of mitigation action steps corresponding to the selected security incident (step568). The set of mitigation action steps may include, for example, sending a security alert to the security analyst for review and possible action. In addition, the set of mitigation action steps may include the computer automatically blocking or terminating an activity or network session corresponding to the security incident. Thereafter, the process returns to step558 where the computer determines whether another security incident exists in the ranked list.

With reference now toFIG. 6, a flowchart illustrating a process for prioritizing security incidents for analysis is shown in accordance with an illustrative embodiment. The process shown inFIG. 6 may be implemented in a computer, such as, for example,server104 inFIG. 1.

The process begins when the computer retrieves, on a periodic basis, a set of security information and event management data corresponding to each of a set of security incidents (step602). The computer uses a source weight of a security incident and a magnitude of the security incident to determine a priority of the security incident within the set of security incidents (step604). The computer performs a local analysis of the security incident based on the retrieved set of security information and event management data corresponding to the security incident and the determined priority of the security incident (step606).

In addition, the computer makes a determination as to whether the security incident should be analyzed remotely based on characteristics of the security incident discovered during the local analysis (step608). A cloud-based platform may, for example, perform the remote analysis of the security incident. If the computer determines that the security incident should not be analyzed remotely based on the characteristics of the security incident discovered during the local analysis, no output ofstep608, then no further analysis of the security incident is performed and the process terminates thereafter. If the computer determines that the security incident should be analyzed remotely based on the characteristics of the security incident discovered during the local analysis, yes output ofstep608, then the computer sends the security incident to the cloud-based platform for remote analysis by a machine learning algorithm (step610).

Subsequently, the computer receives a result of the remote analysis of the security incident from the cloud-based platform (step612). The computer adjusts the magnitude of the security incident based on the result of the remote analysis (step614). Further, the computer performs one or more security incident mitigation action steps corresponding to the security incident when the magnitude of the security incident is greater than a security incident magnitude threshold level (step616). Thereafter, the process terminates.

Thus, illustrative embodiments of the present invention provide a computer-implemented method, computer system, and computer program product for identifying and selecting security incidents reported in security information and event management data for advanced automatic analysis utilizing local contextual data and remote cognitive security analytics. The descriptions of the various embodiments of the present invention have been presented for purposes of illustration, but are not intended to be exhaustive or limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein was chosen to best explain the principles of the embodiments, the practical application or technical improvement over technologies found in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims (20)

What is claimed is:

1. A method for prioritizing security incidents for analysis, the method comprising:

retrieving a set of security information and event management data corresponding to each of a set of security incidents;

using a source weight of a security incident and a magnitude of the security incident to determine a priority of the security incident within the set of security incidents; and

performing a local analysis of the security incident based on the retrieved set of security information and event management data corresponding to the security incident and the determined priority of the security incident.

2. The method ofclaim 1 further comprising:

determining whether the security incident is to be analyzed remotely based on characteristics of the security incident discovered during the local analysis;

responsive to determining that the security incident is to be analyzed remotely based on the characteristics of the security incident discovered during the local analysis, sending the security incident for remote analysis; and

receiving a result of the remote analysis of the security incident.

3. The method ofclaim 2 further comprising:

adjusting the magnitude of the security incident based on the result of the remote analysis; and

performing a security incident mitigation action step corresponding to the security incident when the magnitude of the security incident is greater than a security incident magnitude threshold level.

4. The method ofclaim 2, wherein the characteristics of the security incident discovered during the local analysis include at least one of an observable linked to the security incident, the observable is listed in threat intelligence data, the observable has a security risk score above a threshold, the observable is a known malware hash linked to the security incident, execution of the observable that is a file linked to the security incident, and the observable that is an asset linked to the security incident has an asset weight greater than an asset weight threshold.

5. The method ofclaim 2, wherein the remote analysis is performed by a machine learning algorithm of a cloud-based platform.

6. The method ofclaim 1 further comprising:

determining whether new and unanalyzed security incidents are found during a search of a security incidents database;

responsive to determining that one or more new or unanalyzed security incidents were found during the search of the security incidents database, sorting the found security incidents in descending order by security incident source weight and security incident magnitude of each found security incident;

generating a ranked list of the found security incidents based on the sorting according to the security incident source weight and magnitude of each found security incident; and

selecting a high-ranking security incident in the ranked list.

7. The method ofclaim 6 further comprising:

applying thresholds to the selected security incident;

determining whether the selected security incident is to be analyzed locally based on applying the thresholds to the selected security incident; and

responsive to determining that the selected security incident is to be analyzed locally, performing the local analysis of the selected security incident using a security information and event manager.

8. The method ofclaim 7, wherein the thresholds include a plurality of security incident time thresholds and a plurality of security incident magnitude thresholds.

9. The method ofclaim 6 further comprising:

applying filters to the selected security incident;

determining whether the selected security incident is to be analyzed locally based on applying the filters to the selected security incident; and

responsive to determining that the selected security incident is to be analyzed locally, performing the local analysis of the selected security incident using a security information and event manager.

10. The method ofclaim 9, wherein the filters include a security incident source filter and a security incident category filter.

11. The method ofclaim 1, wherein the set of security information and event management data corresponding to each of a set of security incidents is retrieved on a periodic basis.

12. The method ofclaim 1, wherein a current analysis status of the security incident is also used to determine the priority of the security incident within the set of security incidents.

13. A computer system for prioritizing security incidents for analysis, the computer system comprising:

a bus system;

a storage device connected to the bus system, wherein the storage device stores program instructions; and

a processor connected to the bus system, wherein the processor executes the program instructions to:

retrieve a set of security information and event management data corresponding to each of a set of security incidents;

use a source weight of a security incident and a magnitude of the security incident to determine a priority of the security incident within the set of security incidents; and

perform a local analysis of the security incident based on the retrieved set of security information and event management data corresponding to the security incident and the determined priority of the security incident.

14. The computer system ofclaim 13, wherein the processor further executes the program instructions to:

determine whether the security incident is to be analyzed remotely based on characteristics of the security incident discovered during the local analysis;

send the security incident for remote analysis in response to determining that the security incident is to be analyzed remotely based on the characteristics of the security incident discovered during the local analysis; and

receive a result of the remote analysis of the security incident.

15. The computer system ofclaim 14, wherein the processor further executes the program instructions to:

adjust the magnitude of the security incident based on the result of the remote analysis; and

perform a security incident mitigation action step corresponding to the security incident when the magnitude of the security incident is greater than a security incident magnitude threshold level.

16. The computer system ofclaim 14, wherein the characteristics of the security incident discovered during the local analysis include at least one of an observable linked to the security incident, the observable is listed in threat intelligence data, the observable has a security risk score above a threshold, the observable is a known malware hash linked to the security incident, execution of the observable that is a file linked to the security incident, and the observable that is an asset linked to the security incident has an asset weight greater than an asset weight threshold.

17. A computer program product for prioritizing security incidents for analysis, the computer program product comprising a computer readable storage medium having program instructions embodied therewith, the program instructions executable by a computer to cause the computer to perform a method comprising:

retrieving a set of security information and event management data corresponding to each of a set of security incidents;

using a source weight of a security incident and a magnitude of the security incident to determine a priority of the security incident within the set of security incidents; and

performing a local analysis of the security incident based on the retrieved set of security information and event management data corresponding to the security incident and the determined priority of the security incident.

18. The computer program product ofclaim 17 further comprising:

determining whether the security incident is to be analyzed remotely based on characteristics of the security incident discovered during the local analysis;

responsive to determining that the security incident is to be analyzed remotely based on the characteristics of the security incident discovered during the local analysis, sending the security incident for remote analysis; and

receiving a result of the remote analysis of the security incident.

19. The computer program product ofclaim 18 further comprising:

adjusting the magnitude of the security incident based on the result of the remote analysis; and

performing a security incident mitigation action step corresponding to the security incident when the magnitude of the security incident is greater than a security incident magnitude threshold level.

20. The computer program product ofclaim 18, wherein the characteristics of the security incident discovered during the local analysis include at least one of an observable linked to the security incident, the observable is listed in threat intelligence data, the observable has a security risk score above a threshold, the observable is a known malware hash linked to the security incident, execution of the observable that is a file linked to the security incident, and the observable that is an asset linked to the security incident has an asset weight greater than an asset weight threshold.

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